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SubjectRe: [ANNOUNCE] 3.2-rc1-rt1 - Compile errors also for rc1 vanilla
Tim,

On Mon, 14 Nov 2011, Tim Sander wrote:
> When trying to select the rcu in the menuconfig it is not selectable :-(.

Yeah, my bad. !SMP wants TINY_RCU and I excluded that. Fix below along
with various other fixes.

> Will there be still some consolidation for the 3.0 kernel. I really
> was hoping that the rt kernel still remains a little longer on 3.0
> since this seems to be a longer maintained kernel version for
> various groups?

As I said in the 3.0.9-rt25 release mail, 3.0-rt will be now
maintained by Steven Rostedt and will get bugfixes and stable updates.

http://lkml.org/lkml/2011/11/12/61

Thanks,

tglx

------------->

Index: linux-3.2/include/linux/rcutree.h
===================================================================
--- linux-3.2.orig/include/linux/rcutree.h
+++ linux-3.2/include/linux/rcutree.h
@@ -60,7 +60,7 @@ static inline void exit_rcu(void)
#ifndef CONFIG_PREEMPT_RT_FULL
extern void synchronize_rcu_bh(void);
#else
-# define synchronize_rcu_bh() synchronize_rcu()
+# define synchronize_rcu_bh synchronize_rcu
#endif
extern void synchronize_sched_expedited(void);
extern void synchronize_rcu_expedited(void);
Index: linux-3.2/kernel/softirq.c
===================================================================
--- linux-3.2.orig/kernel/softirq.c
+++ linux-3.2/kernel/softirq.c
@@ -447,6 +447,7 @@ int in_serving_softirq(void)
preempt_enable();
return res;
}
+EXPORT_SYMBOL(in_serving_softirq);

/*
* Called with bh and local interrupts disabled. For full RT cpu must
Index: linux-3.2/init/Kconfig
===================================================================
--- linux-3.2.orig/init/Kconfig
+++ linux-3.2/init/Kconfig
@@ -410,7 +410,7 @@ config TINY_RCU

config TINY_PREEMPT_RCU
bool "Preemptible UP-only small-memory-footprint RCU"
- depends on PREEMPT && !SMP && !PREEMPT_RT_FULL
+ depends on PREEMPT && !SMP
help
This option selects the RCU implementation that is designed
for real-time UP systems. This option greatly reduces the
Index: linux-3.2/include/linux/sysctl.h
===================================================================
--- linux-3.2.orig/include/linux/sysctl.h
+++ linux-3.2/include/linux/sysctl.h
@@ -25,6 +25,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/compiler.h>
+#include <linux/atomic.h>

struct completion;

Index: linux-3.2/kernel/rcutiny.c
===================================================================
--- linux-3.2.orig/kernel/rcutiny.c
+++ linux-3.2/kernel/rcutiny.c
@@ -243,6 +243,7 @@ void call_rcu_sched(struct rcu_head *hea
}
EXPORT_SYMBOL_GPL(call_rcu_sched);

+#ifndef CONFIG_PREEMPT_RT_FULL
/*
* Post an RCU bottom-half callback to be invoked after any subsequent
* quiescent state.
@@ -252,3 +253,4 @@ void call_rcu_bh(struct rcu_head *head,
__call_rcu(head, func, &rcu_bh_ctrlblk);
}
EXPORT_SYMBOL_GPL(call_rcu_bh);
+#endif

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